Frederick johnson allison



(No Model.)

P. LALLISON.

OIL LAMP.

' [WE/V2072 Patented June 11, 1889.

WJIJV'ESSES N. PETER PbMO-L ihugmpher. Washington D. C

UNITED STATES PATENT OFFICE.

FREDERICK JOHNSON ALLISON, OF PLAISTOWV, COUNTY OF ESSEX, ENGLAND.

OIL-LAMP.

SPECIFICATION forming part of Letters Patent No. 405,065, dated June 11,1889.

Application filed December 19, 1888. Serial No. 2%,028. (No model.) i

To all whom it may concern:

Be it known that I, FREDERICK JOHNSON ALLISON, paint-manufacturer, asubject of the Queen of Great Britain, residing at 23 Gordon Street,Plaistow, in the county of Essex, England, have invented a new anduseful Improvement in the Construction of Oil Lamps which are SelfExtinguishing when Upset, of which the following is a specification.

The object of this invention is to produce a simple and efficientoil-lamp which is selfextinguishing when upset, and in which the dangerof explosion from the hydrocarbon vapor becoming overheated isminimized.

The reservoir of the lamp is constructed on the principle of theunspillable ink-bottle, and the aperture through which the oil is fedwhen refilling is so placedthat no more oil can be fed into thereservoir than will occupy more than at most one-half the capacity ofthe reservoir, so that no oil will flow through the central channel whenthe lamp is upset. Over the'outside of the wick-tube an outer tube withwing-shaped projections is loosely placed, so that when the lamp isupset this outer tube will fall until the wing-shaped projectionsthereon rest against the inside of the top of the burner, the outer tubethus forming a temporary elongation of the wicktube and effectuallyextinguishing the light in the same manner as if the wick were turneddown into the wick-tube.

And in order that my invention may be more fully understood and carriedinto practice, I will now proceed to describe the same with reference tothe accompanying drawings, in which similar letters indicatecorresponding parts in all the figures.

Figure 1 is a partly-sectional elevation of a lamp constructed accordingto this invention. Fig. 2 is a plan thereof, and Fig. 3 is a section ofthe extinguishing-tube.

The body of the lamp is provided with two central invertedtruncated-cone-shaped shields or baffles A and B, the conical chamber 0between them serving to keep cool the vapor in the upper part D of thereservoir.

E is the screw-cap on the aperture f, through which the oil is fed whenthe-lampis being replenished, the said aperture leading into a channel Fbranching off from the bottom part G of the reservoir of the lamp.

In Fig. 1 the lamp is shown fully charged with oil when it has beenreplenished by placing the lamp upon a table or other flat surface andthe oil fed through the aperture f. WVhen so replenished, the oil justreaches to the bottom, or nearly so, of the shield or baffie A. If, now,the lamp is upset, the oil will run into the upper part D of thereservoir, which is made of such capacity that it will hold more oilthan can be fedinto the lamp through the aperture f in the mannerhereinbefore described. Should any of the oil be jerked or otherwisepassed into the conical chamber O, the inner baffle B will prevent itfrom flowing into the burner J. At the same time, when the lamp isupset, the outer tube K will slide along the wick-tube M until thecurved or wing-shaped projections L thereon rest against the top of theinside of the burner J, thus forming an elongation of the wick-tube Mextending to the top of the inside of the burner. The dotted lines shownin Fig. 1 represent the position of the extinguishing-tube K and theprojections L when the lamp is upset. WVhen the lamp is set uprightagain, the extinguishingtube K will slide over the outside of thewicktube M until it falls into its normal position, and the oil willoccupy the bottom part of the reservoir, as before.

In the drawings a cheap form of lamp is shown with a handle H and a flatwick; but it is obvious that the same construction of lamp can be madeto fit into a separate stand, or may be otherwise constructed as to itsoutward form or design, and may be provided with a circular wick, ifdesired, without departing from the nature of my inventiom In the caseof a circular-wick lamp it will only be necessary to make theextinguishing-tube K a double tube instead of a single tube, as showirinFig. 3.

\Vhat I chrim is- A lzunp-reservoir having two shields 0r bzrffles A andB and a feeding-aperture f below the level of the bottom of the shield01' baffle 13, the capacity of the upper part I) of the reservoir beingat least one-half that of the entire reservoir, substantially as and forthe purpose hereinhefore set forth, 10 and illustrated in Figs. 1 and 2.

FREDERICK JOHNSON ALLISON.

\Vitnesses:

(J. 1 MEARING, 5% Fleet Street; London, E. C. PERCY K. 'W001; WARD, 28Southampton Bldg 8., Lendon, TV. 0.

